:root {
  --grad-1: #0ea5e9;
  --grad-2: #6366f1;
  --grad-3: #22d3ee;
}
* {
  box-sizing: border-box;
}
html,
body {
  width: 100%;
  height: 100%;
  overflow-x: hidden;
}
body {
  font-family: "Poppins", ui-sans-serif, system-ui, -apple-system, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Loader */
#loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background: radial-gradient(
      800px 600px at 50% 40%,
      rgba(14, 165, 233, 0.12),
      transparent
    ),
    #0b1220;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
#loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.loader-content {
  text-align: center;
}
.loader-logo {
  font-weight: 800;
  letter-spacing: 0.02em;
  font-size: clamp(28px, 6vw, 54px);
  background: linear-gradient(90deg, #60a5fa, #a78bfa, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: logoPulse 1.8s ease-in-out infinite, logoShift 5s linear infinite;
}
.loader-ring {
  width: 64px;
  height: 64px;
  margin: 14px auto 0;
  border-radius: 999px;
  border: 3px solid rgba(99, 102, 241, 0.3);
  border-top-color: #60a5fa;
  animation: spin 1s linear infinite;
}
.loader-sub {
  margin-top: 6px;
  color: #93c5fd;
  font-size: 0.9rem;
  opacity: 0.85;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes logoPulse {
  0%,
  100% {
    transform: scale(1);
    filter: drop-shadow(0 0 0 rgba(99, 102, 241, 0));
  }
  50% {
    transform: scale(1.03);
    filter: drop-shadow(0 8px 18px rgba(99, 102, 241, 0.3));
  }
}
@keyframes logoShift {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 200% 50%;
  }
}

/* Hero */
#hero {
  position: relative;
}
.animated-gradient {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
      1200px 800px at 20% 10%,
      rgba(14, 165, 233, 0.15),
      transparent
    ),
    radial-gradient(
      1200px 800px at 80% 90%,
      rgba(99, 102, 241, 0.15),
      transparent
    ),
    linear-gradient(
      120deg,
      rgba(14, 165, 233, 0.15),
      rgba(34, 211, 238, 0.05),
      rgba(99, 102, 241, 0.12)
    );
  filter: saturate(1.2);
  animation: floatGradient 16s ease-in-out infinite;
}
@keyframes floatGradient {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(0, -10px, 0) scale(1.02);
  }
}

/* Particles */
#particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

/* Nav/inputs/buttons */
.glass-nav {
  box-shadow: 0 10px 30px -10px rgba(34, 197, 253, 0.2);
}
header nav,
.footer-content {
  overflow-x: clip;
}
.input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0.75rem;
  outline: none;
  transition: box-shadow 0.2s, border-color 0.2s;
}
.input:focus {
  border-color: rgba(59, 130, 246, 0.6);
  box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.15);
}
.btn-primary {
  padding: 0.9rem 1.25rem;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.12s ease, filter 0.2s ease;
}
.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}
.btn-success {
  animation: pulse 0.6s ease-in-out;
}
@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Reveal */
.fade-up {
  opacity: 0;
  transform: translateY(12px);
}
.fade-up.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Services */
.service-card {
  perspective: 1000px;
  border-radius: 1rem;
}
.service-card .card-inner {
  position: relative;
  height: 220px;
  transform-style: preserve-3d;
  transition: transform 0.6s;
  border-radius: 1rem;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.service-card .card-front,
.service-card .card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  text-align: center;
  border-radius: 1rem;
}
.service-card .card-front .icon-wrap {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.service-card .card-back {
  transform: rotateY(180deg);
  color: #cbd5e1;
}
.service-card:hover .card-inner,
.service-card.is-flipped .card-inner {
  transform: rotateY(180deg);
}

/* Process (wrap responsive) */
.process-line {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  align-items: start;
  justify-items: center;
}
.process-line li {
  list-style: none;
  text-align: center;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1rem;
  padding: 1rem 0.75rem;
  width: 100%;
  max-width: 220px;
}
.process-line i {
  width: 22px;
  height: 22px;
}
.process-line span {
  display: block;
  margin-top: 0.5rem;
  font-weight: 600;
}
@media (min-width: 1024px) {
  .process-line {
    grid-template-columns: repeat(5, minmax(140px, 1fr));
    justify-items: stretch;
  }
}

/* Portfolio */
.folio-card {
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1rem;
  overflow: hidden;
  transition: transform 0.2s ease;
}
.folio-card:hover {
  transform: translateY(-4px);
}
.folio-media {
  overflow: hidden;
  height: 220px;
  position: relative;
}
.folio-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
}
.folio-card:hover .folio-media img {
  transform: scale(1.06);
}
.tag {
  padding: 0.25rem 0.5rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0.5rem;
}

/* About abstract */
.abstract-bg {
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 320px;
  background: radial-gradient(
      closest-side at 20% 60%,
      rgba(14, 165, 233, 0.18),
      transparent 60%
    ),
    radial-gradient(
      closest-side at 80% 40%,
      rgba(99, 102, 241, 0.15),
      transparent 60%
    );
  filter: blur(30px);
}

/* Footer + signature */
footer {
  position: relative;
}
footer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: rgba(2, 6, 23, 0.7);
}
.footer-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(
    120deg,
    rgba(14, 165, 233, 0.14),
    rgba(99, 102, 241, 0.14)
  );
  animation: slowPan 30s linear infinite;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}
@keyframes slowPan {
  to {
    background-position: 200% 0;
  }
}
.footer-content {
  position: relative;
  z-index: 1;
}
.footer-link {
  color: #e2e8f0;
}
.footer-link:hover {
  color: #93c5fd;
}
.signature-link {
  color: #a5b4fc;
  animation: lumos 3s ease-in-out infinite alternate;
}
.signature-link:hover {
  color: #c7d2fe;
}
@keyframes lumos {
  from {
    text-shadow: 0 0 4px #818cf8, 0 0 8px #6366f1;
  }
  to {
    text-shadow: 0 0 10px #c7d2fe, 0 0 20px #a5b4fc;
  }
}

/* Motion-safe: réduit les animations si l’utilisateur le demande */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  .service-card .card-inner {
    transform: none !important;
  }
}

/* Mobile tweaks */
@media (max-width: 640px) {
  .service-card .card-inner {
    height: 200px;
  }
}